https://bugs.freedesktop.org/show_bug.cgi?id=66963
--- Comment #126 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #124)
I've noticed, that while watching youtube videos, sometimes (actually rather often) everything freezes. Looks like Xorg crash. It tries to recover but screen freezes, though mouse is working and sound (probably everything else is alive).
Dmesg is flooded with messages: [drm:radeon_cs_ib_chunk] *ERROR* Failed to schedule IB ! radeon 0000:01:00.0: couldn't schedule ib
That's a GPU lock up which may not be related to dpm. I recently fixed an alignment issue with command buffers that may fix these hangs for you. you'll need this patch for libdrm: http://cgit.freedesktop.org/mesa/drm/commit/?id=58d008883165ba35c83041fa9ed8... and this patch for mesa: http://cgit.freedesktop.org/mesa/mesa/commit/?id=a81beee37e0dd7b75422448420e...